Re: Mob Unit Workcentre 7556

Thank you for using the Support Forum. THe only information I could find is Xerox® WorkCentre™ 7525 7530 7535 7545 7556 MOB ADC Assembly Part # 130K71470, but this part is not considered customer installable. Please consider contacting your support centre for further assistance.

Thanks, CherylO-XeroxCommunity Manager

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Re: Mob Unit Workcentre 7556

The MOB sensor does not usually go bad. Color misregistration can be caused by a bad drum, developer housing, transfer belt or the MOB sensor which reads the patches on the transfer belt. I would try cleaning the MOB sensor first.

Re: Mob Unit Workcentre 7556

It would help if you knew which color was out of reg then you can focus on it. The tech can run internal test patterns to see. Replace the ibt assembly or swap drums around to see if the misregistered color changes.

Re: Mob Unit Workcentre 7556

Yes, you are correct. And that is what he did. Found major problems in the blue. Then found the yellow to be subject to issues. After all was done and said, Xerox passed on repairing after making numerous trips and calling experts for direction. This machine is now on the do not repair list because of the issues and the age.

It was supposed to work as just a black and white copier, and did so for about a minute. Now I cannot even do that.

Paper is jamming on entry into the developing unit and will go no further. It runs a warm up sheet, two sided, but that is as far as I can go.

Would love to utilize what is left in the black and white world on this machine.

Re: Mob Unit Workcentre 7556

Technician went through this machine methodically and found issues with the blue and the yellow. Went so far to even start putting in boards to and reloading software.

Machine has been downgraded to the "Do not repair" list with Xerox due to the age and the issues. They wrote off any charges to move on. I accepted and dodged a bullet due to the rising cost of repairing this old machine.

Wanted to use as a black and white machine, but now is jamming on paper input. It will not enter the developer unit and gets jammed up. Have to pull open side cover and remove each time.

It does print a start up sheet two sided just fine when turning on, but that is all I can currently get from machine.